Purification and dehydration device for anhydrous rare earth halides

A dehydration equipment and halide technology, applied in the field of rare earths, can solve the problems of incomplete dehydration of products, unsatisfactory product quality, and large equipment investment.

Pending Publication Date: 2021-09-10
TIANJIN BAOGANG RES INST OF RARE EARTHS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional equipment is used for production. Because the furnace body includes a heating element and has a large volume, the required vacuum degree cannot be reached during the operation process, the product is not dehydrated completely, and the product quality...

Method used

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  • Purification and dehydration device for anhydrous rare earth halides

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Put 500g of lanthanum chloride to be purified and dehydrated into the quartz material boat 5, place it at the bottom of the quartz tube 4, then put the quartz collector 6 into the quartz tube 4, and push it into the inlet and outlet 10 of the quartz material boat 5 8 cm into the quartz collector 6. The stainless steel cover plate 8 with the latex gasket surface is closely attached to the quartz tube 4, and the mechanical vacuum pump 9 is turned on for vacuuming. During the whole purification and dehydration process, the mechanical vacuum pump 9 continues to vacuum the vacuum chamber through the pumping pipeline. Cooling water jacket 7 passes into cooling water. After the vacuum degree reaches below 10Pa, start the heating program of the first resistance wire furnace 1 and the second resistance wire furnace 2 respectively. The second resistance wire furnace 2 is heated to maintain the temperature at about 460°C, and the first resistance wire furnace 1 is heated to 700°C....

Embodiment 2

[0037] Put 1000g of cerium bromide to be purified and dehydrated into the quartz material boat 5, place it at the bottom of the quartz tube 4, then put the quartz collector 6 into the quartz tube 4, and push it into the inlet and outlet 10 of the quartz material boat 5 Stretch into about 6cm in the quartz collector 6. The stainless steel cover plate 8 with the latex gasket surface is closely attached to the quartz tube 4, and the mechanical vacuum pump 9 is turned on for vacuuming. During the whole purification and dehydration process, the mechanical vacuum pump 9 continues to vacuum the vacuum chamber through the pumping pipeline. Cooling water jacket 7 passes into cooling water. After the vacuum degree reaches below 10Pa, start the heating program of the first resistance wire furnace 1 and the second resistance wire furnace 2 respectively, the second resistance wire furnace 2 is heated to maintain the temperature between 400-500°C, and the first resistance wire furnace 1 is ...

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PUM

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Abstract

The invention provides a purification and dehydration device for anhydrous rare earth halides. The purification and dehydration device comprises a quartz tube and a mechanical vacuum pump, wherein a cover plate is arranged at the top of the quartz tube, a quartz material boat and a quartz collector are arranged in the quartz tube, one end of the quartz material boat is arranged in the quartz collector, and the mechanical vacuum pump penetrates through the cover plate and is connected with the quartz tube. According to the purification and dehydration device for anhydrous rare earth halides, heating outside resistance wire furnaces is adopted, the volume of a vacuum cavity is small, the high vacuum degree can be obtained in the production process, the production requirement can be met, and the product quality is improved.

Description

technical field [0001] The invention belongs to the field of rare earths, in particular to an anhydrous rare earth halide purification and dehydration equipment. Background technique [0002] High-purity anhydrous rare-earth halides are important chemical raw materials and the core raw materials for the preparation of high-purity rare-earth metals and a new generation of high-performance rare-earth scintillation crystals, and have extremely broad application prospects. However, during the preparation process, the rare earth halides are easily hydrolyzed to produce oxyhalides, which adversely affects the properties of the rare earth materials prepared by using the rare earth halides. For example, the absolute purity of rare earth halide raw materials in scintillation crystals cannot be lower than 99.95%, and the water and oxygen content must be less than 100ppm, so as to avoid harmful impurities such as oxides and oxygen ions during crystal growth, which will affect the optic...

Claims

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Application Information

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IPC IPC(8): F26B9/06F26B5/04F26B23/06F26B25/00F26B25/16C01F17/10C01F17/253
CPCF26B9/06F26B5/04F26B23/06F26B25/00F26B25/16C01F17/10C01F17/253
Inventor 汪瑞张光睿张瑞森高淞张日成温永清赵长玉李璐
Owner TIANJIN BAOGANG RES INST OF RARE EARTHS
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